Update app.py

app.py

@@ -195,7 +195,7 @@ def upload_audio_file(file_path, bot_id, workspace_id):
     file_size = os.path.getsize(file_path)
 
     # Get file content type
-    content_type = "audio/mpeg"
+    content_type = "audio/mp3"
 
     # Calculate expiration date (3 days from now) with proper timezone format
     now = datetime.now()